I have been following the field of door and window sealing for a long time, and I would like to share some insights on door and window sealing with you. The key to doors and windows lies in sealing, and the sealing effect is played by the rubber strip. Sealing strips must have sufficient tensile strength, good elasticity, good temperature resistance and aging resistance in building doors and windows. The cross-sectional structural dimensions should be scientifically reasonable and perfectly matched with the building door and window profiles. Sealing strips are used for sealing between glass, fans and frames, and play a decisive role in sound insulation, dust prevention, anti freezing, insulation and other aspects.

Previously, the material of sealing strips was generally modified with PVC, and the key role was played by the plasticizers added inside. Currently, stable plasticizers include dioctyl phthalate and dibutyl phthalate, but their market prices are relatively high. So some small manufacturers replaced it with some cheap things.

These hidden dangers are manifested in: 1. Low sealing of doors and windows. Poor quality sealing strips containing inferior plasticizers or substitutes are prone to aging, hardening, and shrinkage in winter. There is a gap between the glass and the profile, causing water leakage and dust ingress. Many users often find that red liquid flows out from the pressure strip inside plastic windows during the rainy season, which is caused by the corrosion of the steel lining between the window glass and the sealing strip due to water ingress. Not only does it greatly reduce the aesthetics of doors and windows, but it also greatly affects their lifespan. 2. There is oil leakage on the surface of the rubber strip. Waste engine oil and PVC are not compatible with sealing strips at all. The surface is prone to grease and yellow spots appear on the profile surface, which is not environmentally friendly, has an odor, and pollutes the air.

Now, with the continuous improvement of door and window grades and the increasing awareness of quality, PVC sealing strips have gradually been replaced by EPDM sealing strips. The EPDM rubber strip is calculated as 2-5% of the total value based on the value of doors and windows. In other words, at a price of 500 yuan per square meter for a window, using high-quality Rising brand EPDM rubber strip is worth 10-25 yuan, ensuring both cost and project quality.

The installation and use of building doors and windows require sealing strips to achieve closed sealing between profiles and glass, as well as between fans and frames. Sealing strips play a role in fixing glass, buffering vibration, and blocking water and air flow in the use of doors and windows. The insulation and air tightness performance of doors and windows have a significant impact on building energy conservation and consumption reduction. The heat loss of poorly sealed doors and windows is 5-6 times that of walls. The energy-saving efficiency of doors, windows, and curtain walls accounts for about 37-40% of building energy efficiency. Therefore, the adhesive strip is not a supporting role in the production of doors and windows. It plays an important role in energy saving and reaching the standard. Its performance and service life should attract our close attention.